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NAS517-4-3
100°; Flush Head Screw
Description
NAS 517-4-3 Close Tolerance Flat Head Screw - 100 Degree
Specifications
| Countersink Angle | Between 99 degrees and 101 degrees |
|---|---|
| Country of Origin | USA |
| Fastener Length | Between 0.641 inches and 0.686 inches |
| Finish | Cadmium per QQ-P-416 Type II Class 2 |
| Grip | 0.188 in |
| Hardness Rating | Between 36 rockwell c and 40 rockwell c |
| Head Angle | 100 º |
| Head Diameter | Between 0.452 inches and 0.510 inches |
| Head Style | Flat Head, Flat countersunk |
| Head Type | Flat |
| Industry Standards/Certification | NAS517 |
| Internal Drive Style | Cross recess type 1 |
| Length | .656 Inch, 0.656 in |
| Material | Steel |
| Min. Tensile Strength (psi) | 160000 pounds per square inch |
| NIIN | 00-206-4399 |
| NSN | 5305-00-206-4399 |
| Screw Material | Steel comp 8630 |
| Screw Material Specification | Mil-s-6050 military specification single material response or an-s-9 military standard single material response |
| Screw Surface Treatment | Chromate and cadmium |
| Screw Surface Treatment Specification | Qq-p-416 type 2 cl 3 federal specification single treatment response |
| Size | 1/4-28 |
| Sold In | Per Package |
| Thread Class | 3a |
| Thread Diameter | 0.25 |
| Thread Direction | Right-hand |
| Thread Length | Between 0.367 inches and 0.513 inches |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series | UNF |
| Thread Series Designator | Unf (fine thread) |
| Thread Size | 0.2500-28, 1/4 |
| Weight | 0.01 lb |
Cross-reference
No interchangeable or dimensionally similar parts are on record for NAS517-4-3. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error